Morgat C, et al. - The aim of this study was to explore the correlations between gastrin-releasing peptide receptor (GRPR) expression and clinical, pathologic, and biologic parameters. In context of the findings, because GRPR is overexpressed in a high percentage of ER-positive tumors, GRPR targeting proposes wide perspectives for imaging and treatment in patients with ER-positive breast cancer, using recently established radiolabeled GRPR ligands.